Enter a clue or pattern or both:
The Clue
Mineral residue (4 letter answer)
The Answer
CALX
Tags
Notes
The answer CALX is rarely seen, appearing only about once every 2400 puzzles.
Related Clues
Heel
Hadrian's heel
Metal oxide
Metal residue
Definition
CALX as a noun:
1. (calcium oxide, quicklime, lime, calx, calcined lime, fluxing lime, unslaked lime, burnt lime) = a white crystalline oxide used in the production of calcium hydroxide